T'ai chi is an ancient Chinese exercise with movements that originate from the martial arts. While used as a type of self-defense in its most advanced form, t'ai chi is practiced widely for its health andrelaxation benefits. Those in search of well being and a way to combat stress have made what has also been called "Chinese shadow boxing" one of...

The common cold is an infection of the upper air passages caused by any one of a group ,of thirty-eight or more types of virus. More than a hundred additional viruses can cause the same symptoms. Easily transmitted from person to person by infected droplets of moisture floating in the air or by contaminated dust, it is a contagious disease. The symptoms develop from one to two days after exposure. A person who...

A tremor is a repetitious, involuntary shaking movement produced by the alternate contraction of opposing groups of muscles. It usually disappears during sleep. In Parkinson's disease (paralysis agitans) there is a slow motion tremor, most noticeable when the muscles are otherwise at rest, which involves the fingers (with a "pill rolling" gesture), the forearms, the head, and the tongue. A tremor...

See Hearing, Disturbances of Tinnitus is commonly called "ringing in the ears" or "ear noise." It is different from auditory hallucinations (see Hearing, Disturbances of). Tinnitus consists of a sensation of noise, hissing, ringing, buzzing, thumping, whistling, or roaring, and is often associated with partial deafness. Tinnitus is caused by an irritation, and thus an abnormal stimulation,...

Emotional tensions occur in persons ill at ease or baffled by problems seemingly too difficult to solve. In some cases the person knows, at the level of intellect, what he should do but is deterred by his emotions (fear, love, hate) from acting. In other cases moving in the sensible direction would require him to forfeit some cherished desire; so emotional pressures build up while the solving of the problem...